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0001 /*
0002  * Licensed to the Apache Software Foundation (ASF) under one or more
0003  * contributor license agreements.  See the NOTICE file distributed with
0004  * this work for additional information regarding copyright ownership.
0005  * The ASF licenses this file to You under the Apache License, Version 2.0
0006  * (the "License"); you may not use this file except in compliance with
0007  * the License.  You may obtain a copy of the License at
0008  * 
0009  *      http://www.apache.org/licenses/LICENSE-2.0
0010  * 
0011  * Unless required by applicable law or agreed to in writing, software
0012  * distributed under the License is distributed on an "AS IS" BASIS,
0013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0014  * See the License for the specific language governing permissions and
0015  * limitations under the License.
0016  */
0017 
0018 /*
0019  * $Id$
0020  */
0021 
0022 #if !defined(XERCESC_INCLUDE_GUARD_XMLUTF16TRANSCODER_HPP)
0023 #define XERCESC_INCLUDE_GUARD_XMLUTF16TRANSCODER_HPP
0024 
0025 #include <xercesc/util/XercesDefs.hpp>
0026 #include <xercesc/util/TransService.hpp>
0027 
0028 XERCES_CPP_NAMESPACE_BEGIN
0029 
0030 
0031 //
0032 //  This class provides an implementation of the XMLTranscoder interface
0033 //  for a simple UTF16 transcoder. The parser does some encodings
0034 //  intrinsically without depending upon external transcoding services.
0035 //  To make everything more orthogonal, we implement these internal
0036 //  transcoders using the same transcoder abstraction as the pluggable
0037 //  transcoding services do.
0038 //
0039 class XMLUTIL_EXPORT XMLUTF16Transcoder : public XMLTranscoder
0040 {
0041 public :
0042     // -----------------------------------------------------------------------
0043     //  Public constructors and destructor
0044     // -----------------------------------------------------------------------
0045     XMLUTF16Transcoder
0046     (
0047         const   XMLCh* const    encodingName
0048         , const XMLSize_t       blockSize
0049         , const bool            swapped
0050         , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager
0051     );
0052 
0053     virtual ~XMLUTF16Transcoder();
0054 
0055 
0056     // -----------------------------------------------------------------------
0057     //  Implementation of the XMLTranscoder interface
0058     // -----------------------------------------------------------------------
0059     virtual XMLSize_t transcodeFrom
0060     (
0061         const   XMLByte* const          srcData
0062         , const XMLSize_t               srcCount
0063         ,       XMLCh* const            toFill
0064         , const XMLSize_t               maxChars
0065         ,       XMLSize_t&              bytesEaten
0066         ,       unsigned char* const    charSizes
0067     );
0068 
0069     virtual XMLSize_t transcodeTo
0070     (
0071         const   XMLCh* const    srcData
0072         , const XMLSize_t       srcCount
0073         ,       XMLByte* const  toFill
0074         , const XMLSize_t       maxBytes
0075         ,       XMLSize_t&      charsEaten
0076         , const UnRepOpts       options
0077     );
0078 
0079     virtual bool canTranscodeTo
0080     (
0081         const   unsigned int    toCheck
0082     );
0083 
0084 
0085 private :
0086     // -----------------------------------------------------------------------
0087     //  Unimplemented constructors and operators
0088     // -----------------------------------------------------------------------
0089     XMLUTF16Transcoder(const XMLUTF16Transcoder&);
0090     XMLUTF16Transcoder& operator=(const XMLUTF16Transcoder&);
0091 
0092 
0093     // -----------------------------------------------------------------------
0094     //  Private data members
0095     //
0096     //  fSwapped
0097     //      Indicates whether the encoding is of the opposite endianness from
0098     //      the local host.
0099     // -----------------------------------------------------------------------
0100     bool    fSwapped;
0101 };
0102 
0103 XERCES_CPP_NAMESPACE_END
0104 
0105 #endif